Magnet + Steel + NFC, Without Compromise
Tessera is a patent-pending passive HF tag that stays readable when magnetically clamped to steel with rare-earth magnets. No recess, no adhesive, no batteries, no SaaS rent.
Analog Decay (Paper & Plastic)
Asset tags fade. Paper logs get lost. Plastic zip-ties break
under UV light.
The Cost: Cheap to
buy, but you lose the asset when the label fails.
Digital Risk (Bluetooth & GPS)
Batteries die. Monthly SaaS fees bleed your margin. Active
radios create a cyber-attack surface for
criminals to exploit.
The Cost: Expensive
hardware + security liability.
- Paint and labels fade, peel, and go missing.
- QR codes crack, smear, and require phones + line of sight.
- Beacons add batteries, radios, and recurring subscriptions.
- Conventional on-metal NFC tags fail when you add strong magnets.
The Sweet Spot: Passive Intelligence
Aegidis utilizes passive NFC physics. No batteries to charge. No "always-on" radio signals for hackers to intercept. Just a hardened, magnetic data-anchor that bridges your physical asset to your digital ledger.
Tessera exists because no existing passive HF tag can survive the combination of steel + strong magnets + reliable NFC.
When you stick a typical on-metal NFC tag to steel and clamp a strong magnet behind it, the ferrite shield saturates around 0.3–0.4 Tesla. Its permeability collapses, the shield stops working, and the tag detunes or goes unreadable.
- Steel wants to detune the HF antenna.
- The retention magnet drives ferrite into saturation.
- Result: great mounting, dead tag.
- Outer housing: durable shell that protects the stack while remaining compact and flush on steel.
- Flux shunt layer: high-permeability steel that soaks up peak DC flux from the magnet.
- Flux shunt optional: high-permeability steel that reduces peak DC flux near the antenna region.
- High saturation shield: high-Bsat magnetic shield that stays permeable under strong DC bias and also shields at 13.56 MHz.
- HF NFC antenna: tuned to ~13.56 MHz while attached to steel under magnet bias.
- Steel asset surface: designed for reliable reads on steel with strong magnetic retention.
In plain language: the magnet clamps Tessera to steel, and the flux diverter stops that magnet from killing the NFC signal.
| Aspect | Typical On‑Metal HF Tag | Tessera Token |
|---|---|---|
| Shield material | Ferrite sheet | High‑saturation nanocrystalline diverter |
| Saturation flux density | ~0.3–0.4 T | ≥ ~1.0 T |
| Behavior with N52 magnet | Shield saturates, tag detunes | Diverter stays permeable, tag remains readable |
| Mounting | Adhesive / spacer, no strong magnet | Flush magnetic retention on steel |
| Power | Passive HF | Passive HF (no batteries) |
| Backend | Often vendor SaaS | Your Google/Microsoft tenant |
Tessera is built specifically for steel + strong magnets; conventional on-metal tags are not.
Magnetically Retained
Deploy without drilling, welding, adhesives, or dead batteries. Tessera mounts flush to ferrous assets and is removable when workflows change.
Passive HF NFC
Tap with a phone. The tag harvests energy on demand and records the event. No always-on radio, no pairing, no “tracker pings.”
High-Saturation Shielding
Built around a high‑Bsat diverter to preserve HF performance on steel under strong magnetostatic bias.
Your Ledger, Not Ours
Events flow into your private Google/Microsoft environment as a simple audit log. No per-asset rent. No vendor lock-in.
Stop paying "per-asset" rent for trackers that die in 12 months.
You Own The Hardware
One-time purchase. The Tessera token is passive, battery-free, and virtually indestructible. It lasts longer than the equipment it tracks.
- Designed for years of attachment/detachment to ferrous assets with minimal wear.
Secure by Design
- No vendor cloud: tap events can land directly in your Google Workspace or Microsoft 365 tenant.
- Optional secure NFC ICs support authenticated, tamper-resistant interactions.
Taps that land in your own systems
- Tap Tessera with a phone or tablet to open an asset-specific URL.
- Record inspections, damage reports, or status changes with a simple form.
-
Send events directly into:
- Google Sheets / Apps Script / BigQuery
- Microsoft Excel / SharePoint / Power Automate / Power BI
Industrial Assets
- Tools, fixtures, machine panels, racks, vehicles.
- Magnetically retained tokens that withstand steel, magnets, oil, and grime.
Tool Rental Market
- Check-out/in, loss reduction, and rapid audits.
- Magnetically retained identity for tools and equipment without drilling or adhesives.
Defense / Ordnance
- Metal cases, racks, storage systems that cannot be drilled.
- Removable digital identity without adhesives.
Gaming / Consumer
- Tabletop tokens that magnetically attach to ferrous-backed boards.
- NFC-backed state and data for units and scenarios.
Patent Pending 2025: Magnetically retained high-saturation shielded wireless communication device (Tessera architecture).
Patent pending.